What does a higher depth value in circle pack visualization reveal?

A higher depth value in circle pack visualization indicates that there are existing sub-clusters within the data being represented. This is because depth in this context often signifies levels of nested structures or hierarchical relationships among the data points. When the depth value increases, it allows for more intricate relationships to be displayed, showcasing how data points are grouped together into smaller clusters within larger circles.

This hierarchical representation is particularly useful in visualizing complex datasets, as it helps to illustrate not just individual data points, but also the connections and relationships between them. The ability to reveal these sub-clusters enhances the viewer's understanding of the dataset's structure and the relationships among its components.

Thus, a higher depth value directly contributes to uncovering the finer details within the data, making option indicating the revelation of existing sub-clusters the correct choice.